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Progress on the infrared structure of multi-particle gauge theory amplitudes

Contributo in Atti di convegno
Data di Pubblicazione:
2014
Abstract:
I will review some of the recent intense activity concerning infrared and collinear divergences in gauge theory amplitudes. The central quantity in these studies is the multi-particle soft anomalous dimension matrix, which is completely known at two loops for both massless and massive particles, and whose properties are currently being studied at three-loops and beyond. I will describe how, in the massless case, the simple dipole-like structure of the anomalous dimension up to two loops can be exploited in the high-energy limit to study effects that go beyond the standard form of Regge factorization. Furthermore, I will briefly review some of the techniques that have recently been developed to compute the soft anomalous dimension at high orders in perturbation theory, and I will give some examples of applications, including a result valid to all orders in perturbation theory for a specific class of diagrams.
Tipologia CRIS:
04B-Conference paper in rivista
Keywords:
High Energy Physics - Phenomenology; High Energy Physics - Phenomenology
Elenco autori:
Magnea, Lorenzo
Autori di Ateneo:
MAGNEA Lorenzo
Link alla scheda completa:
https://iris.unito.it/handle/2318/1622438
Pubblicato in:
POS PROCEEDINGS OF SCIENCE
Journal
  • Dati Generali

Dati Generali

URL

http://arxiv.org/abs/1408.0682v1
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